<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Hello CKEditor5</title>
    <style>
        .msg{
            width: 200px;
            height: 30px;
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%,-50%);
        }
    </style>
</head>
<body>
    <h2 class="msg">${message}</h2>
</body>
</html>